Granted Patent
Utility
US 4,963,430 · App. 07/294,325
Corrosion and split resistant plastic materials
Inventors:
Frederick A. Kish, Parimal M. Vadhar
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: Jan 6, 1989
Inventors
Frederick A. Kish
Parimal M. Vadhar
Assignee (at issue)
ILLINOIS TOOL WORKS INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.